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audk/BaseTools/Source/C/GenPage/GenPage.c
Hao Wu 3f63e17551 BaseTools/GenPage: Fix potential memory leak 
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
2016-11-08 16:37:36 +08:00

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/** @file
Pre-Create a 4G page table (2M pages).
It's used in DUET x64 build needed to enter LongMode.
Create 4G page table (2M pages)
Linear Address
63 48 47 39 38 30 29 21 20 0
+--------+-------+---------------+-----------+-----------------------------+
PML4 Directory-Ptr Directory Offset
Paging-Structures :=
PML4
(
Directory-Ptr Directory {512}
) {4}
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "VirtualMemory.h"
#include "EfiUtilityMsgs.h"
#include "ParseInf.h"
#define EFI_PAGE_BASE_OFFSET_IN_LDR 0x70000
#define EFI_PAGE_BASE_ADDRESS (EFI_PAGE_BASE_OFFSET_IN_LDR + 0x20000)
UINT32 gPageTableBaseAddress = EFI_PAGE_BASE_ADDRESS;
UINT32 gPageTableOffsetInFile = EFI_PAGE_BASE_OFFSET_IN_LDR;
#define EFI_MAX_ENTRY_NUM 512
#define EFI_PML4_ENTRY_NUM 1
#define EFI_PDPTE_ENTRY_NUM 4
#define EFI_PDE_ENTRY_NUM EFI_MAX_ENTRY_NUM
#define EFI_PML4_PAGE_NUM 1
#define EFI_PDPTE_PAGE_NUM EFI_PML4_ENTRY_NUM
#define EFI_PDE_PAGE_NUM (EFI_PML4_ENTRY_NUM * EFI_PDPTE_ENTRY_NUM)
#define EFI_PAGE_NUMBER (EFI_PML4_PAGE_NUM + EFI_PDPTE_PAGE_NUM + EFI_PDE_PAGE_NUM)
#define EFI_SIZE_OF_PAGE 0x1000
#define EFI_PAGE_SIZE_2M 0x200000
#define CONVERT_BIN_PAGE_ADDRESS(a) ((UINT8 *) a - PageTable + gPageTableBaseAddress)
//
// Utility Name
//
#define UTILITY_NAME "GenPage"
//
// Utility version information
//
#define UTILITY_MAJOR_VERSION 0
#define UTILITY_MINOR_VERSION 2
void
Version (
void
)
/*++
Routine Description:
Displays the standard utility information to SDTOUT
Arguments:
None
Returns:
None
--*/
{
printf ("%s Version %d.%d %s\n", UTILITY_NAME, UTILITY_MAJOR_VERSION, UTILITY_MINOR_VERSION, __BUILD_VERSION);
}
VOID
Usage (
void
)
{
printf ("Usage: GenPage.exe [options] EfiLoaderImageName \n\n\
Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.\n\n\
Utility to generate the EfiLoader image containing a page table.\n\n\
optional arguments:\n\
-h, --help Show this help message and exit\n\
--version Show program's version number and exit\n\
-d [DEBUG], --debug [DEBUG]\n\
Output DEBUG statements, where DEBUG_LEVEL is 0 (min)\n\
- 9 (max)\n\
-v, --verbose Print informational statements\n\
-q, --quiet Returns the exit code, error messages will be\n\
displayed\n\
-s, --silent Returns only the exit code; informational and error\n\
messages are not displayed\n\
-o OUTPUT_FILENAME, --output OUTPUT_FILENAME\n\
Output file contain both the non-page table part and\n\
the page table\n\
-b BASE_ADDRESS, --baseaddr BASE_ADDRESS\n\
The page table location\n\
-f OFFSET, --offset OFFSET\n\
The position that the page table will appear in the\n\
output file\n\
--sfo Reserved for future use\n");
}
void *
CreateIdentityMappingPageTables (
void
)
/*++
Routine Description:
To create 4G PAE 2M pagetable
Return:
void * - buffer containing created pagetable
--*/
{
UINT64 PageAddress;
UINT8 *PageTable;
UINT8 *PageTablePtr;
int PML4Index;
int PDPTEIndex;
int PDEIndex;
X64_PAGE_MAP_AND_DIRECTORY_POINTER_2MB_4K *PageMapLevel4Entry;
X64_PAGE_MAP_AND_DIRECTORY_POINTER_2MB_4K *PageDirectoryPointerEntry;
X64_PAGE_TABLE_ENTRY_2M *PageDirectoryEntry2MB;
PageTable = (void *)malloc (EFI_PAGE_NUMBER * EFI_SIZE_OF_PAGE);
if (PageTable == NULL) {
Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
return NULL;
}
memset (PageTable, 0, (EFI_PAGE_NUMBER * EFI_SIZE_OF_PAGE));
PageTablePtr = PageTable;
PageAddress = 0;
//
// Page Table structure 3 level 2MB.
//
// Page-Map-Level-4-Table : bits 47-39
// Page-Directory-Pointer-Table : bits 38-30
//
// Page Table 2MB : Page-Directory(2M) : bits 29-21
//
//
PageMapLevel4Entry = (X64_PAGE_MAP_AND_DIRECTORY_POINTER_2MB_4K *)PageTablePtr;
for (PML4Index = 0; PML4Index < EFI_PML4_ENTRY_NUM; PML4Index++, PageMapLevel4Entry++) {
//
// Each Page-Map-Level-4-Table Entry points to the base address of a Page-Directory-Pointer-Table Entry
//
PageTablePtr += EFI_SIZE_OF_PAGE;
PageDirectoryPointerEntry = (X64_PAGE_MAP_AND_DIRECTORY_POINTER_2MB_4K *)PageTablePtr;
//
// Make a Page-Map-Level-4-Table Entry
//
PageMapLevel4Entry->Uint64 = (UINT64)(UINT32)(CONVERT_BIN_PAGE_ADDRESS (PageDirectoryPointerEntry));
PageMapLevel4Entry->Bits.ReadWrite = 1;
PageMapLevel4Entry->Bits.Present = 1;
for (PDPTEIndex = 0; PDPTEIndex < EFI_PDPTE_ENTRY_NUM; PDPTEIndex++, PageDirectoryPointerEntry++) {
//
// Each Page-Directory-Pointer-Table Entry points to the base address of a Page-Directory Entry
//
PageTablePtr += EFI_SIZE_OF_PAGE;
PageDirectoryEntry2MB = (X64_PAGE_TABLE_ENTRY_2M *)PageTablePtr;
//
// Make a Page-Directory-Pointer-Table Entry
//
PageDirectoryPointerEntry->Uint64 = (UINT64)(UINT32)(CONVERT_BIN_PAGE_ADDRESS (PageDirectoryEntry2MB));
PageDirectoryPointerEntry->Bits.ReadWrite = 1;
PageDirectoryPointerEntry->Bits.Present = 1;
for (PDEIndex = 0; PDEIndex < EFI_PDE_ENTRY_NUM; PDEIndex++, PageDirectoryEntry2MB++) {
//
// Make a Page-Directory Entry
//
PageDirectoryEntry2MB->Uint64 = (UINT64)PageAddress;
PageDirectoryEntry2MB->Bits.ReadWrite = 1;
PageDirectoryEntry2MB->Bits.Present = 1;
PageDirectoryEntry2MB->Bits.MustBe1 = 1;
PageAddress += EFI_PAGE_SIZE_2M;
}
}
}
return PageTable;
}
INT32
GenBinPage (
void *BaseMemory,
char *NoPageFileName,
char *PageFileName
)
/*++
Routine Description:
Write the buffer containing page table to file at a specified offset.
Here the offset is defined as EFI_PAGE_BASE_OFFSET_IN_LDR.
Arguments:
BaseMemory - buffer containing page table
NoPageFileName - file to write page table
PageFileName - file save to after writing
return:
0 : successful
-1 : failed
--*/
{
FILE *PageFile;
FILE *NoPageFile;
UINT8 Data;
unsigned long FileSize;
//
// Open files
//
PageFile = fopen (LongFilePath (PageFileName), "w+b");
if (PageFile == NULL) {
Error (NoPageFileName, 0, 0x4002, "Invalid parameter option", "Output File %s open failure", PageFileName);
return -1;
}
NoPageFile = fopen (LongFilePath (NoPageFileName), "r+b");
if (NoPageFile == NULL) {
Error (NoPageFileName, 0, 0x4002, "Invalid parameter option", "Input File %s open failure", NoPageFileName);
fclose (PageFile);
return -1;
}
//
// Check size - should not be great than EFI_PAGE_BASE_OFFSET_IN_LDR
//
fseek (NoPageFile, 0, SEEK_END);
FileSize = ftell (NoPageFile);
fseek (NoPageFile, 0, SEEK_SET);
if (FileSize > gPageTableOffsetInFile) {
Error (NoPageFileName, 0, 0x4002, "Invalid parameter option", "Input file size (0x%lx) exceeds the Page Table Offset (0x%x)", FileSize, (unsigned) gPageTableOffsetInFile);
fclose (PageFile);
fclose (NoPageFile);
return -1;
}
//
// Write data
//
while (fread (&Data, sizeof(UINT8), 1, NoPageFile)) {
fwrite (&Data, sizeof(UINT8), 1, PageFile);
}
//
// Write PageTable
//
fseek (PageFile, gPageTableOffsetInFile, SEEK_SET);
fwrite (BaseMemory, (EFI_PAGE_NUMBER * EFI_SIZE_OF_PAGE), 1, PageFile);
//
// Close files
//
fclose (PageFile);
fclose (NoPageFile);
return 0;
}
int
main (
int argc,
char **argv
)
{
VOID *BaseMemory;
INTN result;
CHAR8 *OutputFile = NULL;
CHAR8 *InputFile = NULL;
EFI_STATUS Status;
UINT64 TempValue;
SetUtilityName("GenPage");
if (argc == 1) {
Usage();
return STATUS_ERROR;
}
argc --;
argv ++;
if ((stricmp (argv[0], "-h") == 0) || (stricmp (argv[0], "--help") == 0)) {
Usage();
return 0;
}
if (stricmp (argv[0], "--version") == 0) {
Version();
return 0;
}
while (argc > 0) {
if ((stricmp (argv[0], "-o") == 0) || (stricmp (argv[0], "--output") == 0)) {
if (argv[1] == NULL || argv[1][0] == '-') {
Error (NULL, 0, 1003, "Invalid option value", "Output file is missing for -o option");
return STATUS_ERROR;
}
OutputFile = argv[1];
argc -= 2;
argv += 2;
continue;
}
if ((stricmp (argv[0], "-b") == 0) || (stricmp (argv[0], "--baseaddr") == 0)) {
if (argv[1] == NULL || argv[1][0] == '-') {
Error (NULL, 0, 1003, "Invalid option value", "Base address is missing for -b option");
return STATUS_ERROR;
}
Status = AsciiStringToUint64 (argv[1], FALSE, &TempValue);
if (EFI_ERROR (Status)) {
Error (NULL, 0, 1003, "Invalid option value", "Base address is not valid intergrator");
return STATUS_ERROR;
}
gPageTableBaseAddress = (UINT32) TempValue;
argc -= 2;
argv += 2;
continue;
}
if ((stricmp (argv[0], "-f") == 0) || (stricmp (argv[0], "--offset") == 0)) {
if (argv[1] == NULL || argv[1][0] == '-') {
Error (NULL, 0, 1003, "Invalid option value", "Offset is missing for -f option");
return STATUS_ERROR;
}
Status = AsciiStringToUint64 (argv[1], FALSE, &TempValue);
if (EFI_ERROR (Status)) {
Error (NULL, 0, 1003, "Invalid option value", "Offset is not valid intergrator");
return STATUS_ERROR;
}
gPageTableOffsetInFile = (UINT32) TempValue;
argc -= 2;
argv += 2;
continue;
}
if ((stricmp (argv[0], "-q") == 0) || (stricmp (argv[0], "--quiet") == 0)) {
argc --;
argv ++;
continue;
}
if ((stricmp (argv[0], "-v") ==0) || (stricmp (argv[0], "--verbose") == 0)) {
argc --;
argv ++;
continue;
}
if ((stricmp (argv[0], "-d") == 0) || (stricmp (argv[0], "--debug") == 0)) {
if (argv[1] == NULL || argv[1][0] == '-') {
Error (NULL, 0, 1003, "Invalid option value", "Debug Level is not specified.");
return STATUS_ERROR;
}
Status = AsciiStringToUint64 (argv[1], FALSE, &TempValue);
if (EFI_ERROR (Status)) {
Error (NULL, 0, 1003, "Invalid option value", "Debug Level is not valid intergrator.");
return STATUS_ERROR;
}
if (TempValue > 9) {
Error (NULL, 0, 1003, "Invalid option value", "Debug Level range is 0-9, currnt input level is %d", (int) TempValue);
return STATUS_ERROR;
}
argc -= 2;
argv += 2;
continue;
}
if (argv[0][0] == '-') {
Error (NULL, 0, 1000, "Unknown option", argv[0]);
return STATUS_ERROR;
}
//
// Don't recognize the parameter.
//
InputFile = argv[0];
argc--;
argv++;
}
if (InputFile == NULL) {
Error (NULL, 0, 1003, "Invalid option value", "Input file is not specified");
return STATUS_ERROR;
}
//
// Create X64 page table
//
BaseMemory = CreateIdentityMappingPageTables ();
if (BaseMemory == NULL) {
Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
return STATUS_ERROR;
}
//
// Add page table to binary file
//
result = GenBinPage (BaseMemory, InputFile, OutputFile);
if (result < 0) {
free (BaseMemory);
return STATUS_ERROR;
}
free (BaseMemory);
return 0;
}
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